Locomotive-engine.



MEMZ;

LUCOMOTIVE ENGINE. APPLICATiON FILED 06119. 1914.

1,246,954, Patented Nov. 20, 1917.

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a w I ATTORNEY,v

HVLENTZ.

LOCOMOTIVE ENGINE. MPLICATION men OCT. 19Q1914,

Patented Nov. 20; 1917.

A 4/ 17 {Q A V4 JV rdlllrllrz fl/m 3 ussian a? mvimok vWiTNESSES! Wu 5 ,maamix' H. LENIZ. LOGOMOTIVE ENGINE. APPLICATION FILED OCT. 19; I914.

- latntefl Nov. 20, 1917;

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INVENTOR one snares HUGO nnnrz, or naturism, NEAR BERLIN, GERMANY.

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valves relatively to their respective cylin dens,

A primary object ofmy invention is to provide an arrangement of cylinders and valve gear, wherein the entire movement of the valve gear is short and its mounting .is secure, and it may, at the same time,, be'

operated-by the reversing gear at present employed on locomotives without substantial changes in arrangement or position of the reversing gear; To this end, I provide casings for the inlet and exhaust valves and position these casings relatively one above theiother and mount them on the cylinder in such a position that their center line is laterally removed from a Vertical plane through the axis ofthe cylinder. By this arrangement, the driving means for the valves, which is connected to the valve re versing gear, may extend to a point above the cylinder and cooperate with the mechanism which drives the valve. 7

Another object of my invention is to arrange the inlet and exhaust valves so that "the parts which are directly contacted by superheated steam, and thereby heated to high temperatures, are separated, as much as possible, from the cylinder-and from the exhaust valve.

Another object of the invention is to provide an improved valve comotive engine.

'To these ends my invention consists in the construction, arrangement and combination of parts described hereinafter and pointed out in the clalms.

One illustrative. embodiment of my inventlm is represented by way of example in the accompanying drawings, wherein:-

.7 igure 1 is a side elevation showing the Tarts of a locomotive required for explain mg one embodiment of my invention and Specificatiqnoi Letters Patent.

with, a

Fig. 2 is a longitudinal section through der a suspended in the usual gear for such a 10- Patented Nov. 20, 1917,

Application filed October 19,1914. .Seria1No.867,51S.

the reversing mechanism associated therethe, cylinder and valve casing,'

Figs. 3 and 4.- are .vertical sections taken. on the l1nes'33 and 44', respectively, in

Fig. 2," and Fig. 5 is an end elevation and valve casing.

Referring .to the drawings, a steam cylinmanner from the frame 6 is arranged on each side of the locomotive. -On the ends of these cylinders are cast the valve casings o for distributing the steam, the interiors of which are con- .arana' enrich.

of the cylinder nccted by passage ways a with the interiors of the cylinders. As F ig. 3 shows, the valve casings are shifted away from thevertical middle plane of the cylinder toward the side of the same,so that room is left for the valve gear on the other side. The two' val e casings c are connected together immediately above the cylinder by a chamber (Z which is closed on all sides by the Wall 0 and by the lower portions of the side Walls of the valve casings. This chamber cl is the exhaust clmmber anchthe. exhaust pipe can be connected to [it by means of the branch pipe 6 in the middle. The openings f which establish a connection of the chamber d with the interiors of'the valve casings o and with the interiors of the cylinders are controlled by the exhaust valves 9, for which purpose the edges of the openingsyf are I made as valve seats.

' .Each double seated exhaust valve, 9 is fast on 'a rod g which is mounted by means of a bush h in a hollow guide '5. p The latter opens into a casing is which projects into the chamber, d andcontains the cams Z for the exhaust valves 9 and also the cam shaft Z associated therewith. The .outer end or the bush h is formed as a disk h which forms the valveg.

These extensions contain the inlet valves and are connected by the branches m to the live steam pipe. These casings are divided by walls n, but; at the requiredtime, steam can -be permitted to flow throughopenings n in the walls a. The openings 0 are con-' trolled by inlet valves 0. 7

Each inlet valve. 0 is mounted on a rod 0' mounted in a bush p winch connegts 'phe in.

second seat for the exhaust I The two casings are extended upward. I

the inlet and exhaust valves are driven simuL' taneously. By reversing the valve gear in the usual manner the operation of the valves is also reversed and the direction of operation of the locomotive is reversed. The operation of the above described engine' is as follows :--Live steam enters at m into the casing m and, when the inlet valve 0 is open and the exhaust valve 9 is closed,

passes through the passage Way a to that part of the cylinder in 'front of the piston and drives the piston forward. The expanded steam on the other side of the piston flows through the open exhaust valve 9 at the other end of the engine into the exhaust chamber (1, from which it can escape through the branch pipe 6.

The described locomotive having superposed inlet and exhaust valves displaced out of the vertical middle plane of the cylinders not only has exceedinglyshort steam passages, but the arrangement of the cylinders is such that the cylinderscan be removed from every existing locomotive provided with slide valve gear and the herein described c linder can be. erected in its stead because t e same valve gear, unchanged and in exactly the same position canbe used with the herein-described cylinder that is used valve seat for the exhaust valve. The exhaust valve 9 comprises a ringlike member supported on'a spider which is mounted on the rod 9. The edge of the exhaust opening 7 comprises one seat for the valve memher g, and the disk h comprises the second seat. Formerly the second seat was .sup ported from arms extending from the interior walls of the exhaust chamber, and these arms obstructed the ringlike exhaust steam passage when the exhaust valve was open, but, with the disk it supported from the same member which supports the valve rod 9, a complete ringlike passage is provided which is not obstructed by disk-supporting it arms ma am It is to be understood that the herein described novel arrangement can be employed in a corresponding manner for two-cylinder engines, particularly, in those in which the admission to the low-pressure cylinder controlled by ports in the middle 01 the cylinder.

1. Ina locomotive having puppet valve gear, the combination of a cylinder having at each end inlet and exhaust valve casings positioned one above the other and substantially at the engine side of a vertical plane through the longitudinal axis of said cylinder, inlet and exhaust valves in said casings and having parts extending from said casings to points above said cylinder, andvalve ear extending to said points above said cylinder and operatively connected to said valve parts.

2. In a locomotive having puppet valve gearing, the combination ofa cylinder having at each end inlet and exhaust valve casings positioned one above the other and substantially at the engine side of a' vertical 1. plane through the longitudinal axis of the cylinder, inlet and exhaust puppet valves in said caslngs, saidinlet valves having spindles extending towardeach other and said exhaust valves also havingspindlesextend- 5 'ing toward each other", ii-cam shaft-for opcrating the spindles of the inlet valves and seem shaft for operating the spindles of, the exhaust valves, said shafts. being arranged one above the other transversely of the cylin inder and between the said inlet and exhaust valve casin s, and means operatively con necting sai cam shafts.

3. In a locomotive having puppet valve gear, the combination of a cylinder, inlet and :exhaust valve casings. for each end of the cylinder, the exhaust valve casings being intermediate the cylinder and the inlet valve casings, inlet and exhaust puppetvalves in said casings, whereby the exhaust steam is prevented from passing over the inlet valves, said inlet valves having spindles extending toward each other, spindles for the exhaust valves extending from said valves toward each other, .and means operatively related to the spindles .for operating the same. I

4. In a locomotive having gear, the combination of a cylinder, inlet puppet valve and exhaust valve casings at each end of 120.

the cylinder, the exhaust valve casings at each end of the cylinder being beneath the inlet valve casings at each'end, inlet valves in the inlet chambers and having spindles extending therefrom towardeach other, exhaust valves in the exhaust valve chambers and havingspindles extending therefromto ward each other, cam shafts extending transversely of the spindles and arranged one above the other for operating said valve 130 therewith into which casings lead openings for admitting and exhausting steam, and

fvalves controlling said openings, the exhaust openings being between the inlet openings and the cylinder, whereby the exhaust steam.

' will pass through the exhaust openings before reaching the valveslcontrolling the inlet openings.

{3. In a locombtive having puppet valve gear, the combination of a cylinder, steamconducting casings one at each'end of'the cylinder having one end communicating with said cylinder and-the other end adapted to receive'steam from a source of supply, valves controlling the flow in said casings of steam" from said supply, exhaust openings in said casings, an exhaust valvefor each exhaust opening, a chamber extending between said casings and communicating with said/exhaust. openings and lying intermediate the cyl nder and the steam inlet ends of the cas ngs, and mechanism extending from; the

exhaust valves into said chamber to operate said exhaust valves.

7. In a locomotive having/puppet valve gear, the combination of a cylinder, a steaminder! In testimony; whereof, I aflix my signatureconducting casing communicating therewith havingan' exhaust opening, a chamber com municating with the exhaust opening of said.

casing and forming an exhaust chamber, a double-seated exhausflvalve' controlling said exhaust opening, the edge of said exhaust .opening 'comprising one seat for said valve,

avalveguide withinsfaidmhamber, a second valve seat for said valve "and supported by said valve guide, and means for conducting steam'tosaid cylinder. ig.

8. In a/locomotive having, puppet valve gear, the combination of a cylinder, a steam- '--c0nduct1ng casing communicating therewith havingan exhaust opening, a chamber oom- 'municating with the exhaust;opening of said casing and forming an exhaust chamber, a

double-seatedexhaust valve controlling said exhaust ,o1)enin g, jthe edge of said exhaust open ng-compris ng one seat for said valve,

a valveguide within said chamber, a bush mg therein andshaving a portlon formed to provide-a second valve seat for said valve,

and'means for conducting steam to said cyl in the'presence of two witnesses.

' HUGO LENTZ.

= -Witnesses:'

HENRY HAsPER,

Us, WOLDEMAR HAUPT. 

